Air-compressor.



No. 888,553. PATBNTBD MAY 26, 1908.

C. P. TOLMAN.

AIR COMPRESSOR.

APPLIOATION FILED MAR. 21,1906.

2 SHEETS-SHEET l.

ilIlIIlli-Iy i (L5M-neuron HARLEPTOLMAN. xj is tozwu No. 888,553. PATENTED MAY 26, 1908.

' G. P. TOLM AIB. COMPRE APPLIGATION FILED MAR. 21, 1

8 SECTION o D gnou/Foz C HARLESPTOLMA N.

Haga/ MLK -is hollow and divided by a partition 27 into UNITED sTATEs PATENT oEEIcE.

CHARLES P. TOLMAN, OF NEW YORK, N. Y., AS-SIGNOR, BZY MESNE ASSIGNMENTS, TO ROTENG ENGINEERING CORPORATION, OF NEW `YORK,.N. Y., A CORPORATION OF NEW YORK.

AIR-COMPRESSOR.

Application led March 21,

To all whom it may concern:

Beit known that I, CHARLES P. ToLMAN, a citizenof the United States, residing at New York city;y in the State of New York, have invented a new and useful Air-Compressor, of which the following is a specification.

My invention re ates to improvements in air compressors and engines, or motors, of the rotary type in which radially disposed cylinders securely attached to, or an integral part of a hub, are mounted to turn on a spindle or bearing, said cylinders being fitted with pistons which reciprocate therein and which are movably mount-ed to turn about an axis eccentric with reference ,to the axis of revolution of the cylinders.

The object of my invention is to provide a simple and compact com ressor or motor which shall be of the hig lest possible efficiency.

My invention consists of the novel construction, arrangement and combination of the various devices and arts, as hereinafter more particularly descriiied and specified in the claims.

In .the drawings I show a construction by which the invention may be carried out, in which Figure 1 is a vertical section of the device taken longitudinally through the axis of the main hearing; Fig. 2 a sideview of the combination hearing; Fig. 3, a horizontal longitudinal section ot' the combination bearing; Fig. el, an cnd view of said bearing; Figs. 5 and 6, sectional views of the same on lines 11e-b and c-d respectively of F ig. 3.

Similar numerals refer to similar parts throughout the drawings.

Referring to the drawings, a frame or support 2S), provided with an oil reservoir 19, supports a combination bearing shown in Fig. 2, which consists of an eccentric bearing 2 and aamain bearing 9,' the interior of which two compartments 14 and 15, one for intake l and the other for discharge of fluid. A huh I 2U, which carries a plurality of cylinders 1, is l revolubly mounted on said main bearing 9, l said cylinders :being provided or fitted with pistons 12. Said pistons are provided with l Specication of Letters Patent.

Patented May 26, 1908.

1906. Serial No. 807,182.

roller bearings 13, which protrude into annular grooves 1n cover plate 4 and case 3, by which said pistons are supported in said cylinders. The outer extremities of the pistons are preferably rovided with fiat surfaces on both sides whic 1 fit into annular recesses provided in cover plate 4 and case 3, the object of such a construction being to prevent accidental rotation of the pistons in their respective cylinders, which rotation would interfere with the pro er operation o f rollers 13. Case 3 is revolufily mounted on eccentric `bearing 2, and is provided with oil drainage holes 11 to allow escape of excess oil from said case into the frame or support 29. An oil guard flange 10, attached to or an integral art of said case 3, operates within a receiving flange 21, which receiving flange catches any excess oil delivered to it by centrifugal force. from oil guard flange 10, and permits the same to drain into oil reservoir 19. The inner end of each cylinder is provided with a suitable port 22, which leads through hub 2t) into main bearing 9,.and which is capable of communication with suitable ports 14 and 15 in the wall of main bearing 9 which leads respectively into compartments 14 and 15 of the combination bearing.

Hub 20 is provided, at each end, with a recess into which is placed a suitable backing 6 (shown in the drawing as a metallic ri and suitable backing followers 7, which fol owers are attached to the hub in any suitable manner. One end of said hub is exten'ded sufficiently to permit the attachment thereto of any desirable drive shaft or shaft to be driven, as by coupling 18,' and, if desirable, said extension may be rovided with a pulley 24, suitably attache( to the hub, or an integral part thereof, forl driving the device as a compressor, or for transmitting power when it is used as a motor. A retaining ring or collar 23, suitably attached to the end of main bearing 9, serves to restrain hub 2() in place.

A groove 26 in one end of the combination bearing receives a supply of lubricantfrom a suitab e connection 25 in case 29. Duets 16 and 17, shown in Fig. 3, convey a portion of said su ply of lubricant to the intake passage 14 of t ie valve within main hearing 9, the

balance of said supply beingled by similar ducts, or by grooves, to the other surfaces re niring lubrication.

t is apparent that when the device is used as a compressor, compartment 14 in the. combination bearing is preferably used for intake and compartment 15 for exhaust ot' fluid; and that when the device is used as a motor, the motive agent being a fluid under pressure, or when it is used as a vacuum pump, compartment 14 is the exhaust chamber and compartment 15 is the intake chamber or compartment. Briefly, it will be seen that by reason of its being more readily attached, compartment 15 is preferably the one to be used for connect-ion to that part of a system where a fluid tight joint is desirable.

lith the cylinders, pistons and case in the mechanical relation above described the case is free to take u) such rotation on eccentric bearing 2 as it w1 l; but it is preferable to provide'means whereby the case will be caused to revolve at the same average speed as the cylinders. This may be accomplished in many ways, one such means, for example, being by substituting for one of the rollers 13 a bin 2S which is secured to the case 3 and the piston pivotally mounted thereon. The remaining pistons are mounted as previously described in such manner as to provide for the relative motion of the rollers and the case durinr each revolution. unavoidably takes place since the-case bearing 2 and the cylinder hub bearing 9 are eccentric one to the other.

Since case 3 revolves about a hearing eccentric to the axis of revolution of cylinder hub 20, the pistons will complete an'in and out stroke Jfor each revolution of the cylinder hub. Withtheapparatusoperatingasacompressor and the moving parts starting from the position shown in Fig. 1 and revolving clockwise-when the view is taken from the coupling end, it will be seen that the upper cylinder, during its iirst halt revolution, is in communication, through its port 2 and port 14', with the intake passage or com )artinent 14 in the combination bearing, and that its piston completes its outward or intake stroke during this hall revolution. rlhe continued rotation of the mechanism to complete a revolution brings about the inward stroke of the piston, which stroke compresses the fluid agent within the cylinder, and when the cylin- 'lcr port 22 comes into communication with exhaust passage 15 through port 15', the lluid under pressure in said cylinder is expeilcd into said exhaust cavity and from thence to any connected apparat-us.

Ytlflith the apparatus operating as a motor, the motive agent being supplied to the apparatus from a source of sup ly connected to compartment 15, said agent eing a fluid u nder pressure, it is apparent that said motive This variation.

agent will pass from compartment l through its port and through port 22 ofthe cylinder which happens to be in the proper angular posit-ion to receive said agent. The action of this agent on the piston in said cylinder forces the piston outward, thereby causing rotation of the. apparatus. As thls rotation continues port 22 iinally overtravels port 15' and the supply of motive agent is thereby cut ofi from this cylinder; the ports of the succeeding cylinders are brought into communication with said port 15', and the further rotation of the apparatus brings port 22 of the first. cylinder Into communlcation with port 14 of passage 14, through which ass'age the Inotive agent is discharged or eX- iiausted from said cylinder, each succeeding cylinder being discharged in a similar manner as the revolution of the apparatus is continued.

I do not wish to be confined to the precise arrangement or combination of parts here described or shown as the same are capable of modification without departing from the principles of my invention. i

What I claim is:

1. A rotary compressor comprisin a stationaryframe, a bearing carried by sai( frame, and supporting a. hub, radially disposed cylinders mounted on and secured to the hub, an inclosing casing revolublysupported on an eccentric portion of said bearing, and pistons in said cylinders, said pistons being suspended in their respective cylinders by means of rollers vwhich are operative in annular grooves formed in the sides of said casing.

2. A rotary compressor comprising a bearing carried by a stationary frame and having thereon an eccentric portion, a hub supported on said bearing and havinginounted thereon radially -dis vosed cylinders; an' inclosing casing revolu ly mounted on the eccentric ortion ofsaidbearing, and having an annu ar groove in each side of the casin concentric with said eccentric ortion of said bearing and )istons suspendeil)in said cylin ders from rollers which are operative in said annular grooves, said pistons having their outer extremities provided with flat surfaces, which engage an annular recess in said casing.

3. ln a device of the class described the combination of a frame, a bearing carried by the frame and having means therein for inlet and outlet of fluid, a hub rotatably sup ported on said bearing and having a recess at each end, packing in each recess' and packing followers for retaining said packing in said recesses, a plurality of radially disposed cylinders mounted on and Secured to the hub, an inclosing casing rotatably mounted on an eccentric portion of said bearing, pistons movably suspended in the cylinders from annular grooves in said casing, and a lubricant supply system for all bearino surfaces coml In testimony whereof I afx my signature rlslng a common source ofD supply in the in the presence of two witnesses.

rame a receivinvr roove in the earing in communication witx said. source of supply 1 CHARLEb P' TOLMA 5 and ducts and grooves in' said bearing lead- Witnesses:

mg from Saul recelvmg groove to all bearmg .EDWARD TAYLOR,

surfaces. j v (uAs. A. liossmam. 

